Exam_2_2007_KEY

Exam_2_2007_KEY - 1 ANSC 324 Spring, 2007 EXAM 2 100 Points...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 ANSC 324 Spring, 2007 EXAM 2 100 Points NAME:_________KEY _______________ Lab section:_______________________ Instructions: Make sure that you take time to carefully read each question, and then answer the question appropriately. Answers to essay questions do not necessarily have to be long, but answers need to be complete. Make sure that you pace yourself so that you are able to complete the exam. Dont get stuck on any one question. If you dont know the answer to a question, continue to the next question and come back to the one that you are uncertain about at the end. Please write legibly and show all of your work. Good Luck!!! 2 1) Mineral digestibility is calculated based on the disappearance of a given mineral between the feed and the feces. However, this is not very accurate when calculating amino acid digestibilities. Why not? (8 pts.) Amino acids are absorbed in the small intestine. Unabsorbed amino acids that enter the large intestine are often utilize by microorganisms in the large intestine. Therefore, amino acids present in the feces are a combination of unabsorbed amino acids from the feed, microbial proteins, and endogenously lost amino acids/proteins. Therefore, the composition of fecal amino acids is different from the composition entering the large intestine and therefore, is not an accurate means of measuring amino acid digestibility. 2) How are amino acid digestibilities normally calculated? There are 2 methods. What is the difference between the two, and how are they calculated (provide the equations)? (8 pts.) 1) Apparent Ileal Digestibility (AID): endogenous losses are not accounted for AID = ([Amino Acid] Feed [Amino Acid] Digesta )/[Amino Acid] Feed x 100 2) True Ileal Digestibility (TID): accounts for endogenous losses TID = ([Amino Acid] Feed [Amino Acid] Digesta + [Amino Acid] Endogenous )/[Amino Acid] Feed x 100 3 3) Draw a graph of the relative antibody titers provided by colostrum and by active immunity from parturition to 5 wk of age (4 pts.)....
View Full Document

Page1 / 8

Exam_2_2007_KEY - 1 ANSC 324 Spring, 2007 EXAM 2 100 Points...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online